What is the polynomial function of lowest degree with lead coefficient 1 and √i, –2, and 2?
f(x) = x³ – x² – 4x + 4
f(x) = x⁴ – 3x² – 4
f(x) = x⁴ + 3x² – 4
f(x) = x³ + x² – 4x – 4